What is an EdCamp? According to edutopia, Edcamps are: Free to all participants; A free-flow of ideas and information about education, education technology and best practices for teachers; An unconference model of sessions throughout the day for spontaneous topics, chats and activities; The ability of being a presenter is at your discretion (and courage)
Tanning bed bulbs and lamps should be replaced when they have been used to 80 percent of their expected life cycle, and typically hit this mark about one year after they have been installed. Low-pressure lamps have a life cycle of 300 to 1,700 hours, while high-pressure bulbs last 300 to 9,500 hours.
She says a mattress must be firm enough to support a spine. Dr. McEvoy says there is no magic number on replacement, but the times can depend on the weight and quality of the mattress. When we asked people on the street how often they replace their mattresses, the answers ranged from two to 20 years. Many people cited comfort, dust mites and sweat as the reason for replacement.